feat(nvim): add filetype plugin

Use the plugin to simplify/improve the filetype detection.

See also https://github.com/nathom/filetype.nvim

.config/nvim/lua/core/autocmds.lua

@@ -73,32 +73,3 @@ vim.api.nvim_create_autocmd({ 'BufWritePre' }, {
     vim.fn.mkdir(vim.fn.fnamemodify(file, ':p:h'), 'p')
   end,
 })
-
--- Set terraform-vars filetype to terraform
-vim.api.nvim_create_autocmd('BufEnter', {
-  group = augroup('set_filetype_of_tfvars'),
-  pattern = '*',
-  callback = function()
-    if vim.bo.filetype == 'terraform-vars' then
-      vim.opt_local.filetype = 'terraform'
-    end
-  end,
-})
-
--- Set filetype to helm when the file is in certain paths
-vim.api.nvim_create_autocmd({ 'BufNewFile', 'BufRead' }, {
-  group = augroup('set_filetype_of_helm'),
-  pattern = { '*/templates/*.yaml', '*/templates/*.tpl', '*.gotmpl', 'helmfile*.yaml' },
-  callback = function()
-    vim.opt_local.filetype = 'helm'
-  end,
-})
-
--- Set filetype to sh for zsh file ending
-vim.api.nvim_create_autocmd({ 'BufNewFile', 'BufRead' }, {
-  group = augroup('set_filetype_of_shell'),
-  pattern = { '*.zsh' },
-  callback = function()
-    vim.opt_local.filetype = 'sh'
-  end,
-})

.config/nvim/lua/plugins/filetype.lua

@@ -0,0 +1,20 @@
+return {
+  -- https://github.com/nathom/filetype.nvim
+  'nathom/filetype.nvim',
+  lazy = false,
+  config = {
+    overrides = {
+      extensions = {
+        gotmpl = 'helm',
+        tf = 'terraform',
+        tfvars = 'terraform',
+        zsh = 'sh',
+      },
+      complex = {
+        ['.*/templates/*.yaml'] = 'helm',
+        ['.*/templates/*.tpl'] = 'helm',
+        ['helmfile*.yaml'] = 'helm',
+      },
+    },
+  },
+}